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Analog Devices Inc./Maxim Integrated MAX6419UK23
- Part No.:
- MAX6419UK23
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK23.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:986
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Product details
Overview
MAX6419UK23 from Maxim Integrated is a low-power microprocessor reset supervisor IC with capacitor-adjustable reset timeout, 2.3V ±1.5% factory-trimmed reset threshold, open-drain active-low RESET output, and SOT23-5 package. It monitors VCC from 1.6V to 5V, asserts reset below threshold, holds reset for user-defined timeout after recovery, and guarantees valid operation down to VCC = 1V. Used in battery-powered controllers and portable medical instruments requiring precise brownout protection.
For engineers reviewing the MAX6419UK23 datasheet, MAX6419UK23 pinout, MAX6419UK23 application, or MAX6419UK23 equivalent, this page delivers verified electrical parameters, exact pin functions, real-world timing behavior, reset threshold accuracy over temperature, and validated alternative parts for voltage-monitoring supervisory circuits.
Technical Context
The MAX6419UK23 implements a precision bandgap-based voltage detector with laser-trimmed resistors to set its 2.3V reset threshold (±1.5% at +25°C, ±2.5% over –40°C to +125°C). Its internal 240nA current source charges an external capacitor on the SRT pin to generate a programmable reset timeout period via ramp-to-0.65V comparison.
It features open-drain RESET output compatible with logic supplies up to 5.5V, immune to short VCC transients ≤50µs when overdriven by 100mV, and operates with only 1.6µA typical quiescent current. The device remains functional down to VCC = 1V, ensuring reliable reset assertion during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.3V ±1.5% (typ), factory-laser-trimmed; ensures accurate power-fail detection at nominal system rail |
| Quiescent Current | 1.6µA (typ) at +25°C; enables multi-year battery life in always-on monitoring applications |
| Reset Timeout Range | 275µs to >5ms (with CSRT = 0–15nF); supports µP initialization sequences from fast-boot to complex firmware load |
| VCC Operating Range | 1.0V to 5.5V; guarantees reset validity even as supply collapses to 1V, critical for fail-safe shutdown |
| Output Type | Active-low open-drain RESET; allows wired-OR with auxiliary reset sources and level-shifting to any 0–5.5V logic rail |
| Transient Immunity | Rejects VCC glitches ≤50µs duration when falling 100mV below threshold; prevents false resets in noisy environments |
| Hysteresis | 4 × VTH (≈9.2mV); provides noise margin to avoid oscillation near threshold crossing |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal bias and SRT current source; must connect to low-impedance system ground plane |
| 2 - VCC | Supply and monitor input | Primary power rail input; voltage monitored against 2.3V threshold; valid operation guaranteed down to 1.0V |
| 3 - N.C. | No internal connection | Unused pin; may be left floating or tied to GND per layout best practice; no electrical function |
| 4 - SRT | Reset timeout capacitor interface | Connects to external capacitor (CSRT) to set timeout; 240nA precision current source charges CSRT to 0.65V |
| 5 - RESET | Open-drain reset output | Active-low signal asserted when VCC < 2.3V; requires external pullup (10kΩ–100kΩ) to target logic rail (0–5.5V) |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | tRP = 2.73×10⁶ × CSRT + 275µs; enables precise matching to µP reset timing requirements without firmware changes |
| Guaranteed reset validity to VCC = 1V | RESET remains functional and logic-valid even as supply drops to 1V; eliminates need for secondary brownout IC |
| Low-leakage SRT interface | 240nA ±15% ramp current; supports stable timeout with ceramic capacitors ≥100pF and leakage <10nA |
| Open-drain output with wide voltage compatibility | RESET can drive logic rails from 0V to 5.5V; enables mixed-voltage systems and wired-OR reset arbitration |
| Factory-trimmed 2.3V threshold | ±1.5% accuracy at +25°C, ±2.5% over full temperature range; reduces BOM count vs. resistor-divider solutions |
Applications
| Battery-Powered Medical Monitors | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Portable ECG device powered by single Li-ion cell (2.7–4.2V), requiring guaranteed reset during discharge-induced brownout. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to ARM Cortex-M0 MCU when VCC falls below 2.3V; holds reset for 1.2ms after recovery using 470pF SRT capacitor. Use Value: Prevents corrupted memory writes and firmware lockup during battery sag; 1.6µA ICC extends operational runtime by >15% vs. comparable supervisors. |
Use Scenario: Low-power BCM node monitoring 12V rail (regulated to 3.3V) with transient immunity in engine-bay environment. IC Role / Device Role / Timing Role: Brownout detector triggering system-wide reset on 12V supply dip; open-drain RESET pulled to 5V for CAN transceiver compatibility. Use Value: Rejects ≤50µs load-dump transients; eliminates spurious resets during alternator switching events without external filtering. |
| Industrial Handheld Terminals | Smart Energy Meters |
|
Use Scenario: Ruggedized terminal with dual-supply architecture (3.3V logic, 5V display), requiring coordinated reset across domains. IC Role / Device Role / Timing Role: Single MAX6419UK23 generating RESET asserted to both µP and display controller via separate pullups (3.3V and 5V). Use Value: Enables unified power-cycle response using one supervisor; eliminates timing skew between subsystems during cold start. |
Use Scenario: Revenue-grade meter operating on supercapacitor backup during AC mains failure, needing deterministic reset on capacitor depletion. IC Role / Device Role / Timing Role: Supervisor monitoring 3.3V backup rail; SRT capacitor set for 4.5ms timeout to allow EEPROM save before power loss. Use Value: Ensures data integrity during last 100ms of backup power; 2.3V threshold aligns precisely with supercap cutoff voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP302LSN23T1G | Fixed 2.3V threshold, 140ms min timeout (non-adjustable), SOT23-5, 1.8µA ICC | Lacks capacitor-programmable timeout; suitable only where fixed delay suffices | Select if design requires lowest possible BOM count and timeout tolerance >±20% is acceptable |
| TPS3808G125DBVR | 2.32V threshold, 200ms min timeout (adjustable via external resistor), SOT23-6, 2.8µA ICC | Uses resistor-based timeout (less precise than capacitor method); requires extra pin and layout space | Choose when longer minimum timeout (>200ms) is needed and higher ICC is tolerable |
Compared with MAX6419UK23, NCP302LSN23T1G offers simpler implementation but no timeout flexibility, while TPS3808G125DBVR provides longer delays at the cost of higher current and larger footprint-making MAX6419UK23 optimal for compact, battery-sensitive designs needing precise, user-defined reset hold times.
Availability
MAX6419UK23 is available at Aetrix Electronics and suitable for battery-powered medical monitors, automotive body control modules, industrial handheld terminals, smart energy meters, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6419UK23 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on high reliability and low power.
The MAX6421–MAX6426 family-including MAX6419UK23-is engineered for ultra-low-power microprocessor supervision in space-constrained, battery-critical systems where accurate voltage monitoring and flexible reset timing are essential.
FAQ
What is the exact reset threshold voltage of MAX6419UK23 and how tightly is it specified?
The MAX6419UK23 has a factory-laser-trimmed reset threshold of 2.3V, with ±1.5% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This specification is guaranteed by design and production-tested per Maxim's datasheet Table 1 suffix "23", confirming nominal 2.3V trip point with tight statistical distribution across manufacturing lots.
Can MAX6419UK23 operate reliably when VCC drops below 1.6V?
Yes - the MAX6419UK23 guarantees valid RESET assertion down to VCC = 1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. Its internal circuitry remains functional and the open-drain output maintains logic-level integrity until VCC reaches 1.0V, enabling robust brownout response in deeply sagging supply conditions.
How do I calculate the SRT capacitor value for a 2.5ms reset timeout with MAX6419UK23?
Use the formula tRP = 2.73×10⁶ × CSRT + 275µs. For tRP = 2.5ms (0.0025s), solve: CSRT = (0.0025 − 0.000275) / 2.73×10⁶ = 815pF. A standard 820pF X7R ceramic capacitor meets this requirement and satisfies the low-leakage (<10nA) recommendation in the datasheet.
Is MAX6419UK23 pin-compatible with other devices in the MAX642x series?
MAX6419UK23 uses the 5-pin SOT23-5 package and shares identical pinout with MAX6340, MAX6424, MAX6425, and MAX6426. Pin 1 = GND, Pin 2 = VCC, Pin 3 = N.C., Pin 4 = SRT, Pin 5 = RESET - making it mechanically and electrically interchangeable with those variants for board reuse.
Does MAX6419UK23 require an external pullup resistor on the RESET pin, and what value is recommended?
Yes - because MAX6419UK23 features an open-drain RESET output, an external pullup resistor is mandatory. The datasheet recommends 10kΩ to 100kΩ, selected based on target logic rail voltage and total capacitive load. For a 3.3V system with moderate fanout, a 47kΩ resistor provides optimal rise time and noise immunity without excessive current draw.
MAX6419UK23 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.313V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6419UK23 FAQ
1.How can I place an order for MAX6419UK23 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK23 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6419UK23 reliable?
The price and inventory of MAX6419UK23 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK23 is usually 5 days.
3.What payment methods are accepted for MAX6419UK23?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK23 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK23?
MAX6419UK23 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK23 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6419UK23?
For technical support, including MAX6419UK23 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK23 requirements.
6.How does Aetrix verify that MAX6419UK23 is sourced from the original manufacturer or authorized distributors?
All MAX6419UK23 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6419UK23 meets industry standards.
7.What is the process for return or replacement of MAX6419UK23?
All MAX6419UK23 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK23, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6419UK23 part is unused and in its original packaging.
Return procedure for MAX6419UK23:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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